Method of drying materials.



R. B. PRICE.

METHOD OF DRYING MATERIALS.

APPLICATION FILED FEB. 3.1913- 5] mm; ntoz Patented Dec. 19, 1916.

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OF NEW YORK, N. 321, ASSIGNOR Ta RUBBER REGENEEJATING CUMPANY, A GOREORATEON F INDIANA.

METHOD OF DRYING- MATERIALE aeoaeaa specification of Letters Patent. Pa,tremtoi Dean, to, imflfi,

Application filled February 3, 1918. Serial No. tttflit't. v

To all whom it may concern:

Be it known that I, RAYMOND B. PRICE, a citizen of the United States, residing in the borough of Manhattan, city of New York, State of New York, have invented new and useful improvements in Methods of Drylviaterlals, of which the following is pu e 1 is a longitudinal sectional view l drier; Fig. 2 1s a cross-sectionat on line 2Q, Fig. 1'; Fig. 3 is a elevation, partly in section, ot a medi 1; Fig". 4: is longitudinalsectional a modified iorrn oi drier,

string to Figs. 1 and 2, designates c'iosed chamber of any suitable construction in which the material to he treated is dis .Jed, and through whlch the super heated vapor is passed in such manner as to necessitate its coming into intimate conact with, that is "to say, pass through, the said material. The chamber has an M n tape it or any desired size at one end e an outlet pipe 12 at its opposite end,

hoth out which may he provided with area controlling means, such as valves 13 and it. its modified term shown in Fig. 3, the chamber 15 is shown to be capable oi rotation bodily in order to agitate the material therein during its treatment and in the modified form shown in Fig. 14: the chamber 16 is shown to be provided with interior agitators it. in the charnher 10 there are trays or shelves 1B for holding the material, and

exposing the same to intimate contact with the superheated vapor during its passage through the chamber.

i The alcove described steam which otherwise would not be used,

such as that from the exhaust of engines vsame to apparatus is partic-' 'ulariy adapted to the drying of rubber stock or shoddy in the process of devulcanization and other apparatus. After the steel; has been heated up to as high a temperature as possible with Wet steam, the superheated steam or other vapor is introduced. at first causes a mixture of superheated steam and dry steam which afterward results in super sated steam alone coming in contact With the rubber, thereby thoroughly drying it.

The superheated vapor employed may he introduced at atmospheric pressure or at any increased pressure desired. (Or loy enerting a vacuum upon the chamber the superheated vapor could he admitted at less than atmospheric pressure, as Will he readily understood. lit Wlll also he understood that the vapor may he introduced at a regulated pressure at one end, and its rate of speed through the chamber he edectually controlled hy varying the area of the discharge C r this control of speed may he area" of an exhausting apps to the discharge side or the L is My of material thus sub the action oi a superheated vapor, stca he most eiilectualty and c Tried moisture, draining the 3. such rapidly deprived at it either r stocir, or that of the Wet the steam ahsorhing the a capacity, or, in other Words, until s uratcd, the ray idity of operaprocess "will he dependent upon er the steam, the quantity em nloyer". the t .i 'oerature and the depreeotf he understood that the chamber may be so constructed that theadmission This to up from condensation 55 and discharge of the material to be treated may be intermittent or continuous, as shown for instance, in Fig. i where the rubber is fed through the casing from the hopper 20 and discharged through the outlet 21:. The

admission and discharge oi the superheated 1W vapor, as Well as any vacuum or exhaust ap-. plied to the chamber, may also he intermittent or continuous.

The chainher employed maybe provided with a jacket 2?; to more edectually retain the heat therein,and may also he provided with the heatinglcoiis 2 l While I prefer to employ a pure super heated vapor during the drying operation, ll

may, if desired, mix therewith. a certain quantity of other dry fluid or gas, such as bymiaing with air, inert gas or the like,

' pi e 25,

yprocess may be used for drying rubber wherever moisture is present, but is especially useful for drying rubber waste. The injurious efiect of oxidation which is present when the usual drying method is followed, is perhaps more conspicuous in this form of rubber and therefore, greater advantages are attained in this instance from the use of my process, which entirely eliminates any exidizin action.

Having thus descn ed my invention,-

what I claim as new and desire to secure by Letters Patent is:

1. The method of treating rubber to pre-' vent its oxidation while drying which consists in enveloping the rubber in a heated non-oxidizing vapor atmosphere for a part of the treatment below the saturation point and for another part of the treatment above the saturation point.

2. The method of treating pulverized reincense 3. The method of treating pulverized reclaimed rubber to prevent its oxidation and spontaneous combustion while maintaining it in a state of agitation which consists in enveloping the rubber in a heated non-oxidizing vapor atmosphere maintained for a part of the treatment below the saturation point and for another part of the treatment above the saturation point.

In testimony whereof, I have hereunto set my hand in the presence of two subscribing witnesses.

RAYMOND B. PRICE. Witnesses:

CHARLOTTE M. Sumner, MAY V. SMITH. 

